<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Flask upload with Dropzone example</title>
  <link rel="stylesheet" href="{{ url_for('static', filename='dropzone.css') }}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" type="text/css" />
  <script src="dist/jquery-3.4.1.min.js"></script>
  <script src="dist/dropzone.js"></script>
</head>
<body>
<div id="myId" class="dropzone" style="width: 800px; height: 300px;">点我上传</div>
<script type="text/javascript">
    //下面两行是js和jquery的方式实现绑定div的例子，你选择一种即可
    //var myDropzone = new Dropzone("#myId", { url: "{{ url_for('upload_file') }}" });
    $("#myId").dropzone({ url: "#" });
   </script>

</body>
</html>